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想听 > 问答 > 高中 > 数学 > 【请教4道GMAT数学题,我不需要几个字母啊,Q2:Acertaincharacteristicinalargepopulationhasadistributionthatissymmetricaboutthemeanm.If68percentofthedistributionlieswithinonestandarddeviationdofthemean,whatpercen】
问题:

【请教4道GMAT数学题,我不需要几个字母啊,Q2:Acertaincharacteristicinalargepopulationhasadistributionthatissymmetricaboutthemeanm.If68percentofthedistributionlieswithinonestandarddeviationdofthemean,whatpercen】

更新时间:2023-09-29 02:29:04
问题描述:

请教4道GMAT数学题,我不需要几个字母啊,

Q2:

Acertaincharacteristicinalargepopulationhasadistributionthatissymmetricaboutthemeanm.If68percentofthedistributionlieswithinonestandarddeviationdofthemean,whatpercentofthedistributionislessthanm+d

A.16%

B.32%

C.48%

D.84%

E.92%

Q24:

FactorPercentofRespondents

User-friendly56%

Fastresponsetime48%

Bargainprices42%

ThetablegivesthreefactorstobeconsideredwhenchoosinganInternetserviceproviderandthepercentofthe1,200respondentstoasurveywhocitedthatfactorasimportant.If30percentoftherespondentscitedboth“user-friendly”and“fastresponsetime,”whatisthemaximumpossiblenumberofrespondentswhocited“bargainprices,”butneither“user-friendly”nor“fastresponsetime?”

A.312

B.336

C.360

D.384

E.420

Q28:

Aschooladministratorwillassigneachstudentinagroupofnstudentstooneofmclassrooms.If3

董文葆回答:

  我2.17也考GMAT.来回答你的问题哦:Q2:题设说的是数据分布在均值附近一个标准差范围内的比率是68%.问:数据比均值+1个标准差这个数小的概率是多少?解答是1-(1-68%)/2=84%选DQ24:选“user-friendly”或者“fastre...

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